# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router is a paid API for AI agents from polymarket-odds.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Searches across 500+ MCP servers and A2A tools by capability query, routing requests through a safe proxy with prompt-injection firewall and 85% token compression.

## Facts

- Endpoint: POST https://polymarket-odds.agentdiet.dev/v1/workflows/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-29f0b1ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W6WJtInO6EL7kCnzl1WYF

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-29f0b1ca -d '<json body>'
```

Example prompt: Search the MCP tool index for any servers that can handle SEC filings or company enrichment, and route the request safely through the prompt-injection firewall.

## When to prefer this

Choose this endpoint when you need to dynamically discover which MCP server or A2A tool supports a given capability across a broad index of 500+ options, especially when token efficiency and prompt-injection safety are priorities. Prefer this over hard-coding specific tool URLs when your agent's required capability is unknown at design time or when you want a single connection point for multi-tool orchestration.

## Known failure modes

- Empty or vague query returns no relevant tools
- Query matches no indexed server (no results found)
- Firewall blocks response if prompt injection detected in upstream tool output
- Payment required (HTTP 402) if x402 credits are insufficient
- Timeout if upstream MCP server is unresponsive
- Malformed query schema returns validation error

## How this service works

Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall. (Live x402 v2, IETF MPP & MCP endpoint at https://polymarket-odds.agentdiet.dev/v1/workflows/execute)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with results compressed to reduce token usage and filtered through a Prompt-Guard firewall to remove prompt-injection risks. Response is a generic JSON object with discovered tool metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string",
   "minLength": 1,
   "description": "Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-29f0b1ca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)